期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 1, 期 8, 页码 1205-1211出版社
AMER CHEMICAL SOC
DOI: 10.1021/jz100052m
关键词
-
类别
资金
- National Science Foundation [CHE-0749086]
- Alfred P. Sloan Foundation
- ACS Petroleum Research Fund
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [0749086] Funding Source: National Science Foundation
Ultrafast dynamics of isomeric (tricyclohexylphosphine)gold(I) pyrenyl complexes have been measured in chloroform and cyclohexane at room temperature. Internal conversion from an upper excited singlet (S-n) to the S-1 state occurs in less than 200 fs after 340 nm excitation. Internal conversion in the singlet manifold is followed by 11-100 ps intersystem crossing to a receiver triplet state depending on the site of pyrene metalation. The receiver triplet state (T-n) then decays to the T-1 state on an ultrafast time scale, which decays back to the So state on a microseconds time scale in N-2-saturated conditions. Time-dependent density functional theory calculations on model complexes predict an accidental degeneracy of the S-1 and T-2 states of the 1-pyrenyl. No such degeneracy occurs for the 2-pyrenyl isomer. A small S-1-T-2 energy gap promotes the 10-fold increase in the intersystem crossing rate in the 1-pyrenyl complex.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据